.05). Thirty-three percent of all failures were
implants placed in the posterior maxilla, for a 5-year cumulative success rate of 87.4%. Conclusion: It
appears that limited bone dimensions and poor-quality bone have an impact on the performance of
these machined-surface implants. (INT J ORAL MAXILLOFAC IMPLANTS 2003;18:417¨C423)
[article_abstract] => Purpose: In this prospective multicenter clinical study, 1,179 3i standard threaded and self-tapping
implants were followed for up to 6 years and monitored according to established success criteria.
Materials and Methods: A total of 493 patients (240 men and 253 women) with a mean age of 45.1
years at implant surgery were enrolled at 6 research centers after being screened for exclusion criteria.
Implants were placed according to a 2-stage surgical protocol with a minimum of 4 months of submerged
healing in the mandible and 6 months in the maxilla. Restorations included 633 prostheses,
the majority of which were fixed partial dentures in the posterior mandible or maxilla or single-tooth
replacements in the anterior maxilla. Results: One hundred four implants (8.8%) did not meet success
criteria and were designated as failures, and 222 implants (18.8%) were lost to follow-up. The cumulative
success rate according to life table methods was 91.1% at 6 years. Discussion: Sixty percent of
the failed implants were short (¡Ü 10 mm long), and their cumulative success rate as a group at 6 years
was 89.0%, compared to 93.1% for longer implants (P .05). Thirty-three percent of all failures were
implants placed in the posterior maxilla, for a 5-year cumulative success rate of 87.4%. Conclusion: It
appears that limited bone dimensions and poor-quality bone have an impact on the performance of
these machined-surface implants. (INT J ORAL MAXILLOFAC IMPLANTS 2003;18:417¨C423)
[5] => 12
[table_contents_num] => 12
[6] => construction.html
[link_addr] => construction.html
[7] => omi/omi_18_3_Weng12.pdf
[link_pdf] => omi/omi_18_3_Weng12.pdf
[8] =>
[link_abstract] =>
[9] => 10001
[prodsku] => 10001
[10] => 0
[web_enhanced] => 0
[11] => 12814318
[pmid] => 12814318
[12] => 0
[doi] => 0
[13] => 417-423
[page] => 417-423
[14] => 0000-00-00
[entry_date] => 0000-00-00
[15] => 0000-00-00
[pub_date] => 0000-00-00
)
-->